move static files into Apache's responsibility
Resolves #67: Static grid used as an overlay for dynamic contents to improve performance.
See #30: Alert message when no random completion of a ship placement is possible.
Resolved #71.
Removed generation of a fleet for place ships which I forgot to remove after introducing PlaceShipsRndR.
Resolved #69: Removed rulesSize and rulesSafetyMargin and implemented as constants.
- Fixed issue with initShips: Tried to place all ships, although some were already present.
- Water background in ship placement.
- Placement grid removed as a route.
- Some functions stripped of board size parameters.
- Game import now pure.
- Shooting and moving now works in Firefox again.